I could see that originally a normal direct was planned for the end of January. Since there was this unexpected hype for more information on Switch games, Nintendo might decided to capitalize on this urge of their fans and gave them some relieve on their own created excitement.
If this is the case, I expect that they have withholden information on other games in the Nintendo Direct mini, as they had not enough time to prepare it. Should this be true then it is realistic to see the next direct in the coming weeks.